<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>登录验证-非常重要</title>
		<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
	    <script>
	    	function checkUname(){
				//用户输入
				 username=$("#uname").val();
				 
				 //验证规则(正则表达式)
				 reg = /^[a-zA-Z0-9]{3,10}$/;
				 if(!reg.test(username)){
					$("#uname").css("border-color","red");
					return false;
				 } else {
					$("#uname").css("border-color","");
					return true;
				 }
	    	}
			
	    	function checkUpsw(){
	    		psw = $("#upsw").val();
				reg = /^[0-9]{6}$/;
				if (!reg.test(psw)) {
				   $("#upsw").css("border-color","red");
				   return false;
				} else {
					$("#upsw").css("border-color","");
				   return true;
				}
			}
			
			function checkAll(){
				checkUname() 
				checkUpsw();
			}
	    </script>
	</head>
	<body>
		<h3>用户名是字母数字的组合，3-10个；密码6个数字</h3>
		
	用户名<input onblur="checkUname()" type="text" id="uname" />
	 密码<input onblur="checkUpsw()" type="password" id="upsw" />
	<button onclick="checkAll()">登录</button>
	
	</body>
</html>
